Island



(ModeL) INVENTDRS- G. P. WILSON & P. OREILLY. Preparation of Paper Stock from Colored Rags.

\WITNESSES.

@MJEm/M Pk Up 0 UNITED STATES GEORGE F. WILSON, OF EAST PROVIDENCE, AND PHILIP OREILLY, 0h"

PROVIDENCE, RHODE ISLAND.

PRE'PA'RATIUN 0F PAPER-STOCK FROM C9120 REIT aafis SPECIFICATION forming part of Letters Patent No. 227,463, dated May 11, 1880.

Application filed April 12, 1880. (Spccimenal To all whom it mag concern:

Be it known that We, GEO. F. WILSON, or East Providence, and IHILIP-OBEILLY, of Providence, both ot'the State of Rhode Island, have invented a new and useful Improvement in Preparation of Paper-Stock from Colored Rags, which improvement is fully set forth in the following specification.

The object of our invention is to discharge the coloring-matter from old or new rags or cloth and other kinds of paper-stock, and torender the same White without injury, or comparatively so, to the texture or to the fiber of the materia I So far, as We are aware the course practically pursued by paper marurfaaturersein prepgrin their paper-stock for use'is as follows:

The stock is put into the well-known form of apparatus and boiled for several hours in a solution of quicklime, or of soda-ash, or caustic soda and quicklime, for the double purpose of removing the oils or greasy mat ters adherent to the stock and for discharging the colors. It often happens that the greasy matters are rendered insoluble, or the coloring matters are rendered more prominent, so as seriously to interferev with the action of the chloride of lime. to which the stock is subsequently subjected for bleaching pur-' poses.

In discharging colors from misprints or calicoes the niordants are usually removed by various acid baths adapted to the particular mordants; after which the colors can be easily removed by alkalies. This process, however, affects more or less injuriously the strength of the cloths.

We have found that the, mordants can be treated with chemicals in such a manner that a double decomposition in the bath \vill take place in contact with the colors, and the effect of this nascentaction, so produced, will be to produce the oxidation or de'oxidation of the mordants, and that the discharge of the coloring-matters may be brought about without injury to the fabrics or paper-stock so treated. y

In order to enable those skilled in the art to carry into effect our invention, We will describe our process and the chemicals we prefer to use nexed, drawing, specification. V In said drawing is shown an apparatus which we have devised to save labor and to utilize to the utmost extent all or the chemicals employed.

Arepresents an iron-wire basket with a strong iron frame, which holds the paper-stock in the several processes until it is bleached and ready to be dried. This basket is suspended by a rope passing over a pulley, so that it can be readily raised and lowered. u -is suspended filOlIlfeLfiQlFllfiF, l), which travels on a rail, 0. Beneath this rail, and in a line with its length, is a series of keirs, l) E F G H. The basket A can, by raising and lowerwhich forms a part of this big it and moving the carrier B, be readily transferred to any of the heirs.

In connection with the keirHa stirring device, l, is employed. This is so constructed as to be raised and lowered. It is supported in a bearing attached to the bar or rail K, so as to be revolved by means of the belt or strap on. the pulley L. The spindle or arbor of the stirrer passes through the hub of the pulley, and is free to move up and down therein and in its bearin g; but rotary movement independent of the pulley is prevented by aspline-andgroove connection.

From the upper part of the spindle of the stirrer a rope passes over a pulley, M, so that the stirrer may be raised, as shown in full lines, or lowered into the keir, as shown in dotted lines, as required. vA. cover is or maybe employed t'or the keir II. It is made to serve as a step or hearing for the spindle of the stirrer, as well as to close the keir. I

The operation of preparing or bleachingthe stock is as follows: The first step is to put in the wire basket a suitable quantity-say five hundred pounds-of colored rags cut into small pieces, as is the common practice, for convenience in working them. Into the keir D are put, for treating the weight of rags menin it, reference being bad to the an- This pulley tionedffi ve hundred gallons of water and fifteen pounds of caustic soda, to which is added a small quantity-say two gallons-of soft soap. We now put the wire basket and rags into the lreir and boil them,'prei'erably under atmospheric pressure, for about three hours, or sufficiently long to remove the oils and grease,

which may be accomplished with fi'equentstirring in much less time. They may now be transferred in the basket to lreir H, to be thoroughly washed with; water. In washing the stirring'apparatus is employed, it being let.

' down into the position indicated in dotted this solution, where they-are to remain for about three'h'ours, being thoroughly agitated or stirred during this whole or a portion of the time. -While this process is going on we put into the keir F two hundred. gallons of water' having in solution fifteen pounds of chloride of lime, Where the rags are thoroughly stirred and where they remain for about two hours. If the goods have obtained or taken on a brown color they may be washed thou oughly in the heir-H, and then removed to the keir Ggin which has been put two hundred and fifty-gallons of water and. five pounds of oxalic acid. This is forthe purpose of removing any tracesof iron or manganese which may be left in therags. .They are allowed to remain in thissolution for about three hours, when they may be again washed in keir H,

-, and then thrown into a hydroextractor of any ready for shipment.

ordinary or suitable construction, which will take out nearly all the water remaining in them; after which they may be dried and made The rags coming out of this process are ready to be beaten into pulp in the ordinary beating-engines.

Should the rags not have obtained the brown color referred to above they may be returned to the manganese solution again, and then again to the chlorideaof-lime solution, as. be-

fore; The remaining part of thefprocesses lbll 'wing this second treatment will he the same as beibre described. I

Permanganate of potash could be employed for the manganese with excellent results. We,

- would preferto use it, but for economical rea-i sons. v

we have-obtained nearly or quite as good results by means of the soluble salt of manganesabefore referred to, which is prepared in the following way: In a suitable vessel, to

one pound of black oxide of manganese we add one pound of commercial muriatic acid,

season or other quantities in approximately the same proportion'are used. We mix them well and let the whole remain. for from'thirty minutes to one hour, and then add two and one-half pounds of commercial sulphuric acid; stir and heat the mass gently until the manganese is dissolved, then we add about three gallons of water, stir it well, and leave thewhole to settle. In charging the heir E only the clearliquor of the soluble salt of manganese is used. v

'We have indicated the proportions in the, foregoing process withv considerable minuteness in order that the invention could-be readily carried into effect; but it is obvious that these may be varied more or less; and we do not conform ourselves strictly thereto. The stirring apparatus can, if desired, be rcadily constructed so as to be shifted from one keir to the other by supporting the bearing for the spindle of the stirrer in a traveling Qiorackeitf and making the elevating and lowering pulley also movable,'like that which supports the basket. This is not, however, considered necessary, as the stirring is principally required in the washingkier.

Having thus fully described our said invention, and the manner in which the same is or maybe carried into effect, what we claim, and desire to secure by Letters Patent, is--- v 1. The method of discharging the color from the method ofeflecting a double decompos'ition in a contact with the colors, by treating the rage or other stock, after removal of oils and grease, with soluble salt of manganese, permanganate of potash, or similar manganese compound, substantially as described. 3. In the preparation of colored rags or similar stock for paper-pulp, as described, the

method of removing traces of iron or man'- ganese by means of oxalic acid, substantially as. described.

a. The process-of preparing colored rags or similar stock for paper-pulpby boiling the stock with alkali to remove oils and grease, washiug, treating it with a salt or other suitable compouud of manganese, and then with chloride "of nine, Washing, and subjecting it to the action of oxalic acid,substantially as described. y I y '5= ,Cthe method of preparing a soluble manganese=salt for use, as hereinbefore set forth, by treating black oxide of manganese with muriatie and sulphuric acids, substantially as described. 6. The apparatus described, consisting of the series of keirs, the basket, means, substantially as indicated,for transferring said.

basket, as reqiiired, from keir to keir, and a In testimony whereof We have signed this stirring device adapted to be raised and lowspecification in the presence of two subserib- I0 ered, all essentially as set forth. in g Witnesses.

' The combination of the SCiPIGQfhO hear- I GEO. F. YVILSON. 5 ing for its spindle er shaft, apulley or gen-1' PHILIP OREILLY.

connected therewith, as described, and means, Witnesses: as indicated, fermising and lowering the stirf CHARLES GREENE,

rer, substantially as set forth. I AUGUSTUS S. MILLER. 

